---
product_id: 44675717
title: "Membrane Solutions RO Membrane, 400 GPD Reverse Osmosis Membrane, 3.0\"x12\" Water Filter Replacement for Under Sink Home Drinking RO Water Purifier System"
brand: "membrane solutions"
price: "₨44483"
currency: LKR
in_stock: true
reviews_count: 13
category: "Membrane Solutions"
url: https://www.desertcart.lk/products/44675717-membrane-solutions-ro-membrane-400-gpd-reverse-osmosis-membrane-3
store_origin: LK
region: Sri Lanka
---

# 400 GPD high flow capacity 0.0001-micron TFC membrane filtration 97% stabilized salt rejection Membrane Solutions RO Membrane, 400 GPD Reverse Osmosis Membrane, 3.0"x12" Water Filter Replacement for Under Sink Home Drinking RO Water Purifier System

**Brand:** membrane solutions
**Price:** ₨44483
**Availability:** ✅ In Stock

## Summary

> 💧 Pure Power, Perfect Fit – Elevate Your Water Game Today!

## Quick Answers

- **What is this?** Membrane Solutions RO Membrane, 400 GPD Reverse Osmosis Membrane, 3.0"x12" Water Filter Replacement for Under Sink Home Drinking RO Water Purifier System by membrane solutions
- **How much does it cost?** ₨44483 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/44675717-membrane-solutions-ro-membrane-400-gpd-reverse-osmosis-membrane-3)

## Best For

- membrane solutions enthusiasts

## Why This Product

- Trusted membrane solutions brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Premium 400 GPD Flow:** Delivers high-capacity water purification for your home or light commercial needs without compromise.
- • **Universal 12" x 3" Fit:** Seamlessly replaces standard 3012 RO membranes, making upgrades effortless and hassle-free.
- • **Long-Lasting & Ready-to-Use:** Ships dry sealed for extended shelf life and typically lasts 2-3 years depending on water quality.
- • **NSF/ANSI 58 Certified Quality:** Independently tested food-grade TFC membrane ensures trusted, safe drinking water every time.
- • **Ultra-Fine 0.0001 Micron Filtration:** Blocks 99%+ of impurities including heavy metals, organics, and harmful minerals for crystal-clear water.

## Overview

The ROULP-3012-400 is a high-performance 400 GPD reverse osmosis membrane featuring a 0.0001-micron thin film composite layer that removes over 99% of contaminants including heavy metals and salts. Certified to NSF/ANSI 58 standards, it fits standard 12" x 3" housings and offers reliable, long-lasting purification for home and light commercial water systems.

## Description

Buy Membrane Solutions RO Membrane, 400 GPD Reverse Osmosis Membrane, 3.0"x12" Water Filter Replacement for Under Sink Home Drinking RO Water Purifier System: Replacement Under-Sink Water Filters - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

Review: Right fit - Perfect fit and works great
Review: Good quality RO membrane - Supplying with fairly clean water (filtered to 1 micron, 230 ppm after softening, charcoal filtered) I got zero (<5) ppm; the membrane it replaced was at 30 ppm on the same supply. Rated 75 gpd; I got 38 gpd on 45 psi, supply water temperature 55F. This is a reasonable ratio of actual to rating; the membranes are rated at 65 psi and 77F. 100% would buy again.

## Features

- Membrane Solutions ROULP-3012-400 reverse osmosis membrane for home drinking water treatment or maple syrup filter systems are among the most reliable and consistent elements in the industry.
- With the industry-standard 12" x 3" size, this high capacity RO element fits most standard 3012 RO housing for the light commercial reverse osmosis water systems.
- Our membrane elements are shipped dry in an original sealed package for convenient handling and long shelf-life. The membrane normally lasts about 2-3 years depending on your source water quality.
- 400 GPD RO membrane with a high 97% stabilized salt rejection rate. Hundreds of impurities are reduced by over 99% through the 0.0001-micron TFC membrane layer, including heavy metals (fluoride, calcium, magnesium, lead, colloids, chromium, and nitrates), organic materials, and harmful minerals, including other soluble salts found in water resources.
- MS Reverse Osmosis (RO) membranes are made from 100% food-grade Thin Film Composite (TFC) material for ultimate purification performance with high permeate flow, tested by an independent third-party to meet NSF/ANSI 58 standards
- Tips: Recommend work pressure is 100 psi when using this product in a Maple Syrup reverse osmosis system. And we suggest heating and maintaining the raw sap at 104°F(40°C) to prevent clog on the membrane while keeping it under 113°F(45°C) to avoid damage to the membrane due to over-high temperature.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071SGLF18 |
| Best Sellers Rank | #7,165 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #57 in Replacement Under-Sink Water Filters |
| Brand | Membrane Solutions |
| Customer Reviews | 4.6 4.6 out of 5 stars (3,098) |
| Date First Available | May 22, 2017 |
| EU Spare Part Availability Duration | 2 Years |
| External Testing Certification | NSF |
| Global Trade Identification Number | 00850071881868 |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1 pounds |
| Item model number | ROULP-3012-400 |
| Manufacturer | Membrane Solutions Corp |
| Material | Polyamide Thin-Film Composite |
| Number of Items | 1 |
| Product Benefits | Reduces TDS |
| Product Dimensions | 3"D x 3"W x 12"H |
| UPC | 850071881868 |
| Unit Count | 1.0 Count |

## Product Details

- **External Testing Certification:** NSF
- **Item Weight:** 16 ounces
- **Material:** Polyamide Thin-Film Composite
- **Product Benefits:** Reduces TDS
- **Product Dimensions:** 3"D x 3"W x 12"H

## Images

![Membrane Solutions RO Membrane, 400 GPD Reverse Osmosis Membrane, 3.0"x12" Water Filter Replacement for Under Sink Home Drinking RO Water Purifier System - Image 1](https://m.media-amazon.com/images/I/51xGrsk-ZjL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Right fit
*by D***A on December 6, 2025*

Perfect fit and works great

### ⭐⭐⭐⭐⭐ Good quality RO membrane
*by A***A on December 25, 2025*

Supplying with fairly clean water (filtered to 1 micron, 230 ppm after softening, charcoal filtered) I got zero (<5) ppm; the membrane it replaced was at 30 ppm on the same supply. Rated 75 gpd; I got 38 gpd on 45 psi, supply water temperature 55F. This is a reasonable ratio of actual to rating; the membranes are rated at 65 psi and 77F. 100% would buy again.

### ⭐⭐⭐⭐⭐ Great value
*by R***R on January 30, 2026*

Fit perfectly, Great price, and usual fast Amazon shipping.

## Frequently Bought Together

- Membrane Solutions RO Membrane, 400 GPD Reverse Osmosis Membrane, 3.0"x12" Water Filter Replacement for Under Sink Home Drinking RO Water Purifier System
- Membrane Solutions 3012 RO Membrane Housing Kit, Universal for Semi Commercial 200/300/400 GPD Reverse Osmosis Water Filter Systems, RO Filter Housing Wrench Fittings Set
- PUREPLUS 5 Micron 10" x 2.5" Whole House Sediment Home Water Filter Cartridge Replacement for Any 10 inch RO Unit, Culligan P5, Aqua-Pure AP110, Dupont WFPFC5002, CFS10, WHKF-G05, 4Pack

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.lk/products/44675717-membrane-solutions-ro-membrane-400-gpd-reverse-osmosis-membrane-3](https://www.desertcart.lk/products/44675717-membrane-solutions-ro-membrane-400-gpd-reverse-osmosis-membrane-3)

---

*Product available on Desertcart Sri Lanka*
*Store origin: LK*
*Last updated: 2026-03-03*